Which Protocol is used for Android Auto music Streaming ?

[Android Central Question]

I have 2 below questions regarding the Android Auto wired and wireless.

1. USB/Wired Android Auto: Which Protocol is used for Android Auto music Streaming ?
2.Wireless Android Auto: Which Protocol is used for Android Auto music Streaming ?

 

[eric002]

Do you mean which file format for music streaming?

 

[Praveeniet2007]

No file format, i am asking for protocol like A2DP, MTP or USB Mode

 

[eric002]

Pretty sure it's MTP media transfer protocol.

 

[Praveeniet2007]

but for Wireless Android Auto, how it will use MTP?

 

[eric002]

See, now that's a good question. For wireless music streaming wireless AA, I'm not sure. I would just say via Bluetooth

 

[Rukbat]

The app usually doesn't specify the protocol, it specifies "Bluetooth audio" and lets the system decide. App developers aren't usually system developers. (I've done both over the decades. Let's just say it's like the difference between cleaning up after a mouse and cleaning up after an elephant. But cleaning up after the elephant is so much more fun. [Even if you arrive at work on Friday morning at 8 and don't leave to go home until Saturday morning at 4, as I did one "day". But it felt fantastic when we had solved another "unsolvable" problem.])

 

[B. Diddy]

No file format, i am asking for protocol like A2DP, MTP or USB Mode

Not sure how technical of an explanation you're looking for, but Android Auto Wireless uses a direct wi-fi connection in order to handle the bandwidth needed, so presumably the music is streaming via direct transfer of data over a direct wi-fi connection (not Bluetooth/A2DP): https://www.cars.com/articles/wireless-apple-carplay-and-android-auto-where-are-they-now-407297/